A student compares two rechargeable batteries, P and Q.
Each battery is fully charged and then used until it is flat.
The Table shows the total charge that each battery moves round a circuit and the total energy that it transfers.
Table
| Battery | Total charge moved in C\text{C}C | Total energy transferred in kJ\text{kJ}kJ |
|---|---|---|
| P | 5400 | 8.1 |
| Q | 9000 | 10.8 |
Calculate the potential difference of battery P.
A student says:
'Battery Q is better because it transfers more energy to each coulomb of charge.'
Evaluate the student's statement.
Use data from the Table.
Battery Q is used in a torch. The current in the torch is 0.25 A.
Calculate how long battery Q can keep the torch lit.
Give your answer in hours.
94 exam-style questions on Edexcel GCSE Physics 10.1 Circuits, charge and current, covering 10.1.1 Structure of the atom, 10.1.2 Circuit diagrams and symbols, 10.1.3 Series and parallel circuits, 10.1.4 Potential difference and voltmeters, 10.1.5 Energy transferred, charge and potential difference, and 10.1.6 Current, ammeters and charge flow. Each one has a worked solution and a mark scheme showing where the marks go.